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发明公开
CN101932719A 支链α-葡聚糖及生成其的α-葡糖基转移酶和它们的制造方法以及用途 有权 转让

支链α-葡聚糖及生成其的α-葡糖基转移酶和它们的制造方法以及用途
摘要：
本发明通过提供一种支链α-葡聚糖和生成该支链α-葡聚糖的新型的α-葡糖基转移酶、它们的的制造方法以及用途来解决上述课题，所述支链α-葡聚糖以葡萄糖为构成糖，其特征在于，在甲基化分析中，具有下述特征：(1)2，3，6-三甲基-1，4，5-三乙酰基葡萄糖醇和2，3，4-三甲基-1，5，6-三乙酰基葡萄糖醇之比在1∶0.6～1∶4的范围；(2)2，3，6-三甲基-1，4，5-三乙酰基葡萄糖醇和2，3，4-三甲基-1，5，6-三乙酰基葡萄糖醇的总计占部分甲基化葡萄糖醇乙酸酯的60％以上；(3)2，4，6-三甲基-1，3，5-三乙酰基葡萄糖醇为部分甲基化葡萄糖醇乙酸酯的0.5％以上且小于10％；及(4)2，4-二甲基-1，3，5，6-四乙酰基葡萄糖醇为部分甲基化葡萄糖醇乙酸酯的0.5％以上。
摘要（英）：

It is intended to provide a glucan useful as a water-soluble dietary fiber, a method for producing the same, and use thereof. The object is achieved by providing a branched a-glucan, which is an a-glucan including glucose as a constituent sugar and is characterized by having the following features based on a methylation analysis: (1) a ratio of 2,3,6-trimethyl-1,4,5-triacetylglucitol to 2,3,4-trimethyl-1,5,6-triacetylglucitol is in the range from 1:0.6 to 1:4; (2) the total amount of 2,3,6-trimethyl-1,4,5-triacetylglucitol and 2,3,4-trimethyl-1,5,6-triacetylglucitol is 60% or more of partially methylated glucitol acetate; (3) the amount of 2,4,6-trimethyl-1,3,5-triacetylglucitol is 0.5% or more and less than 10% of partially methylated glucitol acetate; and (4) the amount of 2,4-dimethyl-1,3,5,6-tetraacetylglucitol is 0.5% or more of partially methylated glucitol acetate, a novel a-glucosyltransferase producing the branched a-glucan, a method for producing the same and use thereof.

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